Perry there may be a way. Just saw one built by a guy who worked at olympic arms when it was put together. He sold it to his nephew, who is the son of a co-worker. I'll see if I can get a look at it soon. It had HBAR bbl and triangle handguards I'm sure of it. Maybe someone here knows how its done.

-hell i recently did a dissipator 16" 7.62x39 with H-barrel and under the hand-guards gas block and it fit with the USGI triangle hand-guards so i can't really sey how the triangle hand-guards would not fit the standard length H-barrel--???